1998 626 ES check engine light

Tiny
PTC1605
  • MEMBER
  • 1998 ALL OTHER MAKES ALL OTHER MODELS
I have a 98 626 with 192000 miles on it. The check engine light is on and the code was read to be P0400 - EGR flow malfunction. I have had this problem previously - at 96000 miles. At that time I was told I needed a new EGR valve. I had it installed but the problem did not go away. The dealer had to keep the car for close to 2 weeks and ultimately replaced the computer to get the light to stay off. The first time I had this problem the light came on, then went off for a period of time - then on again. Eventually it stays on constantly. The same thing happened this time around. I am skeptical about replacing the EGR valve because it didn't solve anything the first time. I have seen suggestions ranging from replacing the O2 sensors to cleaning the existing EGR valve to not topping off the tank when filling with gas. The car does not run choppy or rough. The kicker is that with the light on it will not pass an emissions test.

Any suggestions would be welcomed.
Do you
have the same problem?
Yes
No
Sunday, January 7th, 2007 AT 6:49 PM

1 Reply

Tiny
SERVICE WRITER
  • EXPERT
My bet is Cosmo can nail this one down, If it were mine, I'd pull off the egr carefully to not damage the gasket ( can reuse if it isn't) and clean the valve and clean out the passageways with a good carbon removing chemical such as seafoam or cleans rite.

I "think" there may hve been some communication lost or confusion about the replacing of the computer. That doesn't sound right IMHO.
Was this
answer
helpful?
Yes
No
Sunday, January 7th, 2007 AT 7:00 PM

Please login or register to post a reply.

Related Check Engine Light Content

Recommended Guides